Machine for shearing metal.



G. G; GOBLE. moms r011 SHEARIYNG METAL. APPLIOATION FILED IEB. 19,1910.

973,032. Y Pdtented0ct.18,1910.

pi s'rs MACHINE FOR SHEARING METAL.

Specification of Letters Patent.

- Patented Oct. 18, 1910.

Application filed February 19, 1910. Serial No. 544,817.

To all whom it may concern:

Be it known that I, CHRISTOPHER G. GOBLE, a citizen of the United States, residing at Byron, in the county of Thayer and State of Nebraska, have invented a new and useful Machine for Shearing Metal, of which the following is a specification.

It is the object of the present invention to provide an improved machine for shearing metal and the machine is designed chiefly for use in shearing bar or strip metal.

It is one aim of the invention to provide, in a machine of this class, means for automatically adjusting the leverage so that the machine will be adapted for use in shearing thin or thick bars and strips without mechanical adjustment being made manually.

With the above and other objects in view, the invention consists in the construction and arrangement of parts shown in the accompanying drawings, in which,

Figure l is a view in side elevation of a metal shearing machine constructed in accordance with the present invention. Fig.

2 is a rear end view thereof. Fig. 3 is a vertical sectional view on the line 33 of Fig. 1.

In the drawings, the machine is shown as embodying, in its structure, spaced plates 5 which have their lower ends bent at right angles as at 6. These plates are secured together by means of bolts 7 and a pivot bolt 8 which will presently be more specifically referred to. It will be observed that the lower ends 6 of the plates 5 project in opposite directions and serve as a base for the device, it being intended that they be secured to any support upon which the machine is mounted. A plate 9 is secured at its rear end between the lower ends of the upright portions of the plates 5 and rests or is adapted to rest at its lower edge upon the said support. A plate 10 is also secured at its rear end between the upper ends of the plates 5 by means of the pivot bolt 8 and may of course be swung either up or down upon the bolt as a pivot. A plate 11 is secured upon the plate 10 and has its lower portion projecting therebeneath and to this projecting portion of the said plate 11 is secured one of the blades of the machine indicated by the numeral 12. A plate 13 similar to the plate 11 is secured to the plate 9 and to the said plate 13 is secured the other blade 14 of the machine. From an inspection of Fig. 1 of'the drawings it will be observed that the shearing edge of the blade 12 is cut at an angle and from an in spection of Fig. 3 that the blades are so relatively offset as to cooperate when the plate 10 is swung down.

The actuating lever of the machine is in cheated by the numeral 15 and is pivoted as at 16 to the forward end of the plate 9. At its said pivoted end, the lever is bifurcated as at 17 and secured at their ends through the furcations, are pins 18 and 19, these pins being suitably spaced. An arm 20 is pivoted to the forward end of the plate 10 and extends between the pins 18 and 19 and this arm is formed in its rear edge with notches 21 adapted to receive interchangeably the pin 18. In its forward edge the arm is formed with notches 22 resulting in a tooth 23. It will be observed that the notches 21 result in teeth which are pre-, sented upwardly so that when the pin 18 is seated in one of the notches and the lever 15 is swung downwardly, the arm 10 carrying the blade 12 will be correspondingly swung and the said blade will cooperate with the blade 14. In swinging the lever up, the pin 18 will ride along the edge of the notch in which it is seated and the arm will be crowded forwardly so as to bring the tooth 23 into engagement with the pin 19 whereupon the arm 10 will be swung upwardly.

As heretofore stated, means is provided for holding a bar being out against swinging up or canting and this means embodies a bar-24 supported at the upper ends of stems 25. These stems are threaded as at 26 and are engaged through respective brackets 27 upon the plate 9 and one of the plates 5. Nuts 28 are threaded upon the stems and bear above and below the said brackets 27 and, as will be readily understood, these nuts may be adjusted so as to elevate or lower the bar 24 which the stems support. It will be observed that the bar 24 is supported opposite the blade 14, near thereto, but elevated so that its lowe: elflge will be in a plane above the upper or cut ting edge of the blade. Consequently, a strip or bar of metal to be cut may be disposed upon the said cutting edge of the blade and resting against the under edge of the bar. As it is the blade 12 which exerts a tendency to swing the correspond ing end of the bar or strip downwardly and the opposite'end upwardly, the bar 24 will hold this last mentioned end of the strip or bar against such movement. It will be understood, of course, that the bar is to be so adjusted that the strip or bar engaged therewith and with the upper edge of the blade 14 will be level so that a straight out will be had.

hat is claimed is: y

1. In a machine of the class described, a base, a fixed blade upon the base, a movable blade cooperating with the fixed blade, a lever pivoted to the base and provided with spaced studs, and an arm connected to the movable blade and extending between the studs and formed upon bot edges with teeth cooperating with the studs, movement of the lever in one direction acting to move the arm to bring one of the teeth upon one edge thereof into operative engagement with one of the studs whereby to elevate the mo'\' able blade, and movement of the lever in an opposite direction acting to bring the other stud into engagement with one of the teeth upon the other edge of the arm whereby to depress the movable blade.

2. In a machine of the class described, a base, a fixed blade upon the base, a movable blade cooperating with the fixed blade, a lever pivoted to the base and provided with spaced studs, and an arm connected to the movable blade and extending between the studs and formed upon both edges with teeth cooperating with the studs the said teeth being oppositely directed on the two edges, movement of the lever in one direction acting to move the arm to bring one of the teeth upon one edge thereof into operative engagement with one of the studs whereby to elevate the movable blade, and movement of the lever in an opposite direction acting to bring the other stud into engagement with one of the teeth upon the other edge of the arm whereby to depress the movable blade.

3. In a machine of the class described, a base, a fixed blade upon the base, a movable blade cooperating with the fixed blade, a lever pivoted to the base and provided with spaced studs, and an arm connected to the movable blade and extending between the studs and formed upon both edges with teeth cooperating with the studs and having spaced portions, and an arm connected to the movable blade and received loosely between the spaced portions and the studs, the lever being formed in its opposite edge with teeth cooperating with the corresponding studs, movement of the lever in one direction acting to move the arm to bring one of the teeth upon one edge thereof into operative engagement with one of the studs whereby to elevate the movable blade, and movement of the lever in an opposite direction acting to bring the other stud into engagement with one of the teeth upon the other edge of the arm whereby to depress the movable blade.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two witnesses.

CHRISTOPHER C. GOBLE. lVitnesses E. EeeERs, P. H. EGGERSS. 

